CVE-2021-28683

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "descriptions": [{"lang": "en", "value": "An issue was discovered in Envoy through 1.71.1. There is a remotely exploitable NULL pointer dereference and crash in TLS when an unknown TLS alert code is received."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-05-20T16:34:19.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://github.com/envoyproxy/envoy/releases"}, {"tags": ["x_refsource_MISC"], "url": "https://blog.envoyproxy.io"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjgg"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2021-28683", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "An issue was discovered in Envoy through 1.71.1. There is a remotely exploitable NULL pointer dereference and crash in TLS when an unknown TLS alert code is received."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://github.com/envoyproxy/envoy/releases", "refsource": "MISC", "url": "https://github.com/envoyproxy/envoy/releases"}, {"name": "https://blog.envoyproxy.io", "refsource": "MISC", "url": "https://blog.envoyproxy.io"}, {"name": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjgg", "refsource": "MISC", "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjgg"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T21:47:33.130Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/envoyproxy/envoy/releases"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://blog.envoyproxy.io"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjgg"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2021-28683", "datePublished": "2021-05-20T16:34:19.000Z", "dateReserved": "2021-03-18T00:00:00.000Z", "dateUpdated": "2024-08-03T21:47:33.130Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:envoyproxy:envoy:1.16.2:*:*:*:*:*:*:*", "matchCriteriaId": "065415B4-0F56-4AE3-B17D-B38416543DDC", "vulnerable": true}, {"criteria": "cpe:2.3:a:envoyproxy:envoy:1.17.1:*:*:*:*:*:*:*", "matchCriteriaId": "EA926D71-E8B2-40D9-9D44-CAC09EB4FCA4", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in Envoy through 1.71.1. There is a remotely exploitable NULL pointer dereference and crash in TLS when an unknown TLS alert code is received."}, {"lang": "es", "value": "Se detect\u00f3 un problema en Envoy versiones hasta 1.71.1. Se presenta una desreferencia de puntero NULL explotable remoto y bloqueo en TLS cuando es recibido un c\u00f3digo de alerta TLS desconocido"}], "id": "CVE-2021-28683", "lastModified": "2026-06-17T03:46:47.317", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-05-20T17:15:07.713", "references": [{"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://blog.envoyproxy.io"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://github.com/envoyproxy/envoy/releases"}, {"source": "cve@mitre.org", "tags": ["Not Applicable", "Third Party Advisory"], "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjgg"}, {"source": "nvd@nist.gov", "tags": ["Third Party Advisory"], "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-xw4q-6pj2-5gfg"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://blog.envoyproxy.io"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/envoyproxy/envoy/releases"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Not Applicable", "Third Party Advisory"], "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjgg"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank the Envoy security team for reporting this issue.", "affected_release": [{"advisory": "RHSA-2021:1322", "cpe": "cpe:/a:redhat:service_mesh:1.1::el8", "package": "servicemesh-proxy-0:1.1.13-1.el8", "product_name": "OpenShift Service Mesh 1.1", "release_date": "2021-04-22T00:00:00Z"}, {"advisory": "RHSA-2021:1324", "cpe": "cpe:/a:redhat:service_mesh:2.0::el8", "package": "servicemesh-proxy-0:2.0.3-1.el8", "product_name": "OpenShift Service Mesh 2.0", "release_date": "2021-04-22T00:00:00Z"}], "bugzilla": {"description": "envoyproxy/envoy: NULL pointer dereference in TLS alert code handling", "id": "1942263", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1942263"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-476", "details": ["An issue was discovered in Envoy through 1.71.1. There is a remotely exploitable NULL pointer dereference and crash in TLS when an unknown TLS alert code is received.", "A NULL pointer dereference vulnerability was found envoyproxy/envoy. This flaw allows an attacker to establish a TLS session that sends an invalid TLS alert code, causing a NULL pointer exception to occur that crashes the application, resulting in a denial of service. The highest threat from this vulnerability is to system availability."], "name": "CVE-2021-28683", "public_date": "2021-04-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-28683\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-28683\nhttps://istio.io/latest/news/security/istio-security-2021-003/"], "threat_severity": "Important"}

{}